Lexus and Rachel say they have offered to come home to care for the for younger -- children. Their father announces he will hire a nanny. And -- already seems to have one in mind. And he said oh I found the perfect man. And I said what's her name. And he said well I think kids and civilian and I said dad. Gypsy Gillian well -- I said I know that woman I know mom was worried you're having an affair with her and you are not to bring -- -- home. But Martin would not be deterred he calls a -- meeting. -- am -- There is going to be and energy and her nanny and there is only one candidate an analyst Jim CMC. Mansion hand -- -- she got the job. Two weeks after Michelle died in her bathtub she. She didn't because she didn't clean shouldn't take care of the children anyway. Glad -- move into the home. Martin told me that he needed help with his younger children we still sleeping with them and -- So we use the nanny or are you the girlfriend. And moved in to help advocates -- a moment when we had opportunity I still stuck with him. So you were both. Trying to look.

This transcript has been automatically generated and may not be 100% accurate.

Testimony in the Martin MacNeil murder trial zeroed in on his behavior the day his wife died.

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